Uvexp

UV exposure

Founder:

hexo

Coops:

rmarko

Status:

active

Created:

2012-03-06

Last Modified:

2016-03-15

UV exposure blah

• 54 x UV led @ 20mA
• 18 x 82ohm resistor

Soldering caused unwanted increase of resistance, so resistors needs to be changed to 50 ohm.

How to

• best exposure time seems to be 12.5 min in the distance of 20 cm.
• for homogeneous exposure change the position of PCB at least one times.

<gallery widths="200px"> File:Pcb_export.png|pcb design File:IMG_20120306_214844.jpg|partly finished, closeup File:IMG_20120306_214357.jpg|partly finished <gallery>

UV exposure with CNC

Builds from internetz:

• http://hackaday.com/2016/03/14/laser-pcb-exposer-built-from-cd-rom-drives/
• https://www.mikrocontroller.net/topic/391759#new